login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A015091 q-Catalan numbers (recurrence version) for q=7. 1
1, 1, 8, 407, 140456, 337520898, 5673390747984, 667480099386451779, 549699898523248769128232, 3168911624115201777713785471406, 127877020635106970108300418456422667248 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

FORMULA

a(n) = sum_{i=1}^{n-1} q^{(i-1)} a(i) a(n-i).

CROSSREFS

Sequence in context: A185254 A191874 A183579 * A008274 A188422 A188393

Adjacent sequences:  A015088 A015089 A015090 * A015092 A015093 A015094

KEYWORD

nonn

AUTHOR

Olivier Gerard (olivier.gerard(AT)gmail.com)

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 17:10 EST 2012. Contains 205644 sequences.